/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.corona;

import java.util.EnumMap;
import java.util.Map;

/**
 * Helps to count the resource type requests
 */
public class ResourceTypeCounter {
  /** Internal map of types to counts */
  private final Map<ResourceType, Integer> typeToCountMap =
      new EnumMap<ResourceType, Integer>(ResourceType.class);

  /**
   * Increment the count for a given resource type
   * @param resourceType Resource type to increment the count of
   */
  public void incr(ResourceType resourceType) {
    Integer current = typeToCountMap.get(resourceType);
    if (current == null) {
      typeToCountMap.put(resourceType, new Integer(1));
    } else {
      typeToCountMap.put(resourceType, current + 1);
    }
  }

  /**
   * Return the count of the ResourceType
   * @param resourceType
   * @return Count of the resource type
   */
  public Integer getCount(ResourceType resourceType) {
    Integer count = typeToCountMap.get(resourceType);
    if (count == null) {
      return 0;
    } else {
      return count;
    }
  }
}
